Borjigon clan said in “The Secret History of the Mongols” – one of the world great cultural and historical written relics, which was written in the 1240 – a year of white mouse. The great emperor Chinggis khan is a grandson of the Bodanchar in 11-th generation, who is the heir of the Burte Chono. It is stated in the historical literature that Bodanchar had separated from his brothers and founded the Borjigon clan. In 1691, when the Manchurian emperior Enkh-Amgalan made Mongolia its tributary state and divided four Mongolian aimags and seven khoshuus, there was founded Borjigon khoshuu of Setsen khan aimag.
In 1911 the name of the khoshuu is changed into Borjigon Setsen van khoshuu. In 1923 the name is changed into Otsol Sansar uuliin khoshuu. From 1931 it was called as Govisumber soum of the Töv aimag, Sumber soum of the Dornogovi aimag. From 1991 it was called as Choir city. From 1994 it is called as Govisumber aimag.
|Sum||Mongolian||Population (2003)||Population (2008)||Population (2014)||Area (km²)||Density (/km²)||Sum centre population (2002) |
|Sümber(Choir)||Сүмбэр||8,996||9,719||11,609||3768.19||2.58||7,998 * (2006)|